Unit 7

Adding and Subtracting within 1,000

Section A

Add and Subtract within 1,000, without Composition or Decomposition

Compare, Count On, and Count Back

Let’s compare numbers and add or subtract.

Add and Subtract with Tens and Hundreds

Let’s add and subtract tens or hundreds.

Count On or Count Back to Subtract

Let’s find the difference between numbers.

Add and Subtract 3-Digit Numbers in Different Ways

Let’s add and subtract 3-digit numbers.

Center Day 1

Let’s add numbers within 1,000.

Section A Practice Problems

Section A

Add and Subtract within 1,000, without Composition or Decomposition

Compare, Count On, and Count Back

Let’s compare numbers and add or subtract.

Add and Subtract with Tens and Hundreds

Let’s add and subtract tens or hundreds.

Count On or Count Back to Subtract

Let’s find the difference between numbers.

Add and Subtract 3-Digit Numbers in Different Ways

Section B

Add within 1,000, Using Place-Value Strategies

Use a Ten to Add within 1,000

Let’s add 3-digit numbers by composing a ten.

Compose a Greater Unit

Let’s add 3-digit numbers and compose tens or hundreds.

Compose Tens and Hundreds to Add

Let’s compose tens and hundreds to add.

Add 3-Digit Numbers

Let’s practice adding within 1,000.

Add within 1,000

Let’s find sums within 1,000 and explain our strategies.

Center Day 2

Let’s add numbers within 1,000.

Section B Practice Problems

Section B

Add within 1,000, Using Place-Value Strategies

Use a Ten to Add within 1,000

Let’s add 3-digit numbers by composing a ten.

Compose a Greater Unit

Let’s add 3-digit numbers and compose tens or hundreds.

Compose Tens and Hundreds to Add

Let’s compose tens and hundreds to add.

Add 3-Digit Numbers

Section C

Subtract within 1,000, Using Place-Value Strategies

Decompose to Subtract

Let’s subtract within 1,000.

Decompose Tens or Hundreds

Let’s decompose a ten or a hundred to subtract.

Think Before You Subtract

Let’s think about decomposing before subtracting.

Decompose a Ten and a Hundred to Subtract

Let’s subtract within 1,000.

Subtract within 1,000

Let’s subtract in a way that makes sense.

Does It Make Sense?

Let’s decide if our answers make sense.

Center Day 3

Let’s add and subtract 3-digit numbers.

Book Drive

Let’s organize information about a book drive.

Section C Practice Problems

Section C

Subtract within 1,000, Using Place-Value Strategies

Decompose to Subtract

Let’s subtract within 1,000.

Decompose Tens or Hundreds

Let’s decompose a ten or a hundred to subtract.

Think Before You Subtract

Let’s think about decomposing before subtracting.

Decompose a Ten and a Hundred to Subtract

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Adding and Subtracting within 1,000

Add and Subtract within 1,000, without Composition or Decomposition

Compare, Count On, and Count Back

Add and Subtract with Tens and Hundreds

Count On or Count Back to Subtract

Add and Subtract 3-Digit Numbers in Different Ways

Center Day 1

Section A Practice Problems

Add and Subtract within 1,000, without Composition or Decomposition

Compare, Count On, and Count Back

Add and Subtract with Tens and Hundreds

Count On or Count Back to Subtract

Add and Subtract 3-Digit Numbers in Different Ways

Add within 1,000, Using Place-Value Strategies

Use a Ten to Add within 1,000

Compose a Greater Unit

Compose Tens and Hundreds to Add

Add 3-Digit Numbers

Add within 1,000

Center Day 2

Section B Practice Problems

Add within 1,000, Using Place-Value Strategies

Use a Ten to Add within 1,000

Compose a Greater Unit

Compose Tens and Hundreds to Add

Add 3-Digit Numbers

Subtract within 1,000, Using Place-Value Strategies

Decompose to Subtract

Decompose Tens or Hundreds

Think Before You Subtract

Decompose a Ten and a Hundred to Subtract

Subtract within 1,000

Does It Make Sense?

Center Day 3

Book Drive

Section C Practice Problems

Subtract within 1,000, Using Place-Value Strategies

Decompose to Subtract

Decompose Tens or Hundreds

Think Before You Subtract

Decompose a Ten and a Hundred to Subtract

Have a correction or suggestion?

Unit 7 Resources

Center Day 1

Add within 1,000

Center Day 2

Subtract within 1,000

Does It Make Sense?

Center Day 3

Book Drive

Add and Subtract within 1,000, without Composition or Decomposition

Compare, Count On, and Count Back

Add and Subtract with Tens and Hundreds

Count On or Count Back to Subtract

Add and Subtract 3-Digit Numbers in Different Ways

Center Day 1

Section A Practice Problems

Subtract within 1,000, Using Place-Value Strategies

Decompose to Subtract

Decompose Tens or Hundreds

Think Before You Subtract

Decompose a Ten and a Hundred to Subtract

Subtract within 1,000

Does It Make Sense?

Center Day 3

Book Drive

Section C Practice Problems

Add within 1,000, Using Place-Value Strategies

Use a Ten to Add within 1,000

Compose a Greater Unit

Compose Tens and Hundreds to Add